Continuously Geometrical Tuning to Boost Circular Dichroism in 3D Chiral Metamaterials

Qiang Chen; Yawei Wu; Yongzhi She; Yilong Zhao; Jinlong Yang; Lijuan Chen; Peiwu Liu; Min Wu; Changgan Zeng; Zeming Qi; Chuansheng Hu; Hengjie Liu; Ying Xiong; Yangchao Tian; Yang Chen; Hongbing Cai; Nan Pan; Xiaoping Wang

doi:10.1002/adom.202400593

journal article·2024-07

Continuously Geometrical Tuning to Boost Circular Dichroism in 3D Chiral Metamaterials

Qiang Chen, Yawei Wu, Yongzhi She, Yilong Zhao, Jinlong Yang, Lijuan Chen, Peiwu Liu, Min Wu, Changgan Zeng, Zeming Qi, Chuansheng Hu, Hengjie Liu, Ying Xiong, Yangchao Tian, Yang Chen, Hongbing Cai, Nan Pan, Xiaoping Wang

Advanced Optical Materials· Volume 12· Issue 21

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Source abstract

Abstract

Abstract Chiral metamaterials possess unique optical chiral responses, and the attainment of remarkable intrinsic chirality typically necessitates the disruption of their mirror symmetry to facilitate cross‐coupling between electric and magnetic dipoles. However, achieving such symmetry breaking in a flexible and controllable manner remains challenging due to the limited range of applications afforded by available methodologies. Here, a method is proposed for fabricating robust three‐dimensional (3D) chiral metamaterials by projecting arbitrary planar chiral metasurfaces onto on‐demand height‐tunable 3D silicon structures, thereby effectively modulating their optical chiral responses through continuously tuning the degree of cross‐coupling between dipoles. Experimental and simulation results demonstrate this approach's ability to precisely control circular dichroism (CD) from a non‐chiral state to various activated and enhanced chirality. Enhancing CD with high precision and continuous control manners can naturally provide an advanced opportunity and platform for the future design and actual applications of chiral optical systems.

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Research context

OpenAlex topics: Metamaterials and Metasurfaces Applications · Liquid Crystal Research Advancements · Electromagnetic Scattering and Analysis

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Hefei National Laboratory for Physical Sciences at the Microscale University of Science and Technology of China Hefei Anhui 230026 China

USTC Center for Micro‐ and Nanoscale Research and Fabrication University of Science and Technology of China Hefei Anhui 230026 China

Chinese Academy of Sciences Key Laboratory of Mechanical Behavior and Design of Materials Department of Precision Machinery and Precision Instrumentation University of Science and Technology of China Hefei Anhui 230026 China

Department of Physics University of Science and Technology of China Hefei Anhui 230026 China

National Synchrotron Radiation Laboratory University of Science & Technology of China Hefei Anhui 230029 China

Division of Physics and Applied Physics School of Physical and Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore

Funding

National Natural Science Foundation of China · Ministry of Science and Technology of the People's Republic of China

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